1921. |
1922. Distance formula for direct-co-direct product in the case of disconnected factorsAleksander Kelenc, Iztok Peterin, 2023, original scientific article Abstract: Direct-co-direct product $G\circledast H$ of graphs $G$ and $H$ is a graph on the vertex set $V(G)\times V(H)$. Two vertices $(g,h)$ and $(g',h')$ are adjacent if $gg'\in E(G)$ and $hh'\in E(H)$ or $gg'\notin E(G)$ and $hh'\notin E(H)$. We show that if at most one factor of $G\circledast H$ is connected, then the distance between two vertices of $G\circledast H$ is bounded by three unless some small number of exceptions. All the exceptions are completely described which yields the distance formula. Keywords: direct-co-direct product, distance, eccentricity, disconnected graphs Published in DiRROS: 19.03.2024; Views: 476; Downloads: 208 Full text (450,88 KB) This document has many files! More... |
1923. |
1924. With computed tomography confirmed anterolateral left ventricular pseudoaneurysm in patient with dilatative alcoholic cardiomyopathyMitja Letonja, Marija Šantl-Letonja, 2011, original scientific article Abstract: Background. Pseudoaneurysms are rare complications of myocardial infarction with propensity for rupture. There is still a challenge with which diagnostic imaging we performed a final diagnosis of pseudoaneurysm and differentiate it from true aneurysm what is clinically important due to the different treatment. Case report. We presented the unusual case of a 56-year-old man with signs of decompensated heart failure which had worsened a few months before hospitalization. We believed that during worsening of symptoms the patient suffered a silent myocardial infarction complicated by subacute free wall rupture which resulted into left ventricular pseudoaneurysm formation without tamponade. Echocardiography showed dilatativecardiomyopathy which was already present years before and a very rare location of the left ventricular pseudoaneurysm on the anterolateral part of the left ventricle. Pseudoaneurysm was confirmed with CT scan. Due to the severity of contractile dysfunction and no response in treatment for congestive heart failure the directive for the resection was tempered and the patient died due to the progressive heart failure and embolic phenomena. Conclusions. This report shows the importance of non-invasive imaging diagnostic evaluation of acute decompensated heart failure where echocardiography and chest X-ray are the first diagnostic steps. Based on those findings further imaging diagnostic steps must be performed such as CT scan in our case which finally confirms left ventricular pseudoaneurysm with dilatative cardiomyopathy. Published in DiRROS: 19.03.2024; Views: 350; Downloads: 158 Full text (415,90 KB) This document has many files! More... |
1925. Electrogene therapy with interleukin-12 in canine mast cell tumorsDarja Pavlin, Maja Čemažar, Andrej Cör, Gregor Serša, Azra Pogačnik, Nataša Tozon, 2011, original scientific article Keywords: psi, tumor, zdravljenje, elektrogenska terapija, plazmidi Published in DiRROS: 19.03.2024; Views: 453; Downloads: 153 Full text (667,74 KB) |
1926. The core of a vertex transitive complementary prism of a lexicographic productMarko Orel, 2023, original scientific article Abstract: The complementary prism of a graph $\Gamma$ is the graph $\Gamma \overline{\Gamma}$, which is formed from the union of $\Gamma$ and its complement $\overline{\Gamma}$ by adding an edge between each pair of identical vertices in $\Gamma$ and $\overline{\Gamma}$. Vertex-transitive self-complementary graphs provide vertex-transitive complementary prisms. It was recently proved by the author that $\Gamma \overline{\Gamma}$ is a core, i.e. all its endomorphisms are automorphisms, whenever $\Gamma$ is vertex-transitive, self-complementary, and either $\Gamma$ is a core or its core is a complete graph. In this paper the same conclusion is obtained for some other classes of vertex-transitive self-complementary graphs that can be decomposed as a lexicographic product $\Gamma = \Gamma_1 [\Gamma_2]$. In the process some new results aboutthe homomorphisms of a lexicographic product are obtained. Keywords: graph homomorphism, core, complementary prism, self-complementary graph, vertex-transitive graph, lexicographic product Published in DiRROS: 19.03.2024; Views: 418; Downloads: 212 Full text (411,68 KB) This document has many files! More... |
1927. |
1928. Morphological and molecular characterization of Micromeria croatica (Lamiaceae), an endemic and potentially valuable horticultural species of the Dinaric AlpsZlatko Liber, Ivan Radosavljević, Zlatko Šatović, Marija Hodja, Vesna Židovec, Faruk Bogunić, Dalibor Ballian, Danijela Stešević, Sven D. Jelaska, Dario Kremer, 2023, original scientific article Abstract: Due to climate extremes and limited natural resources, especially water, we can expect increased demand in the future for species that can better tolerate climate extremes such as drought. One potentially valuable horticultural species is the endemic species of the Dinaride Mountains Micromeria croatica (Pers.) Schott (family Lamiaceae). It grows in the crevices of carbonate rocks, extending from an altitude of 150 m to more than 2000 m. This study aims to provide additional insight into the genetic and morphological diversity of this endemic species, focusing on valuable horticultural traits. To achieve this goal, morphological and molecular analyses were performed on ten natural populations. Through STRUCTURE and PCoA analyses, ten M. croatica populations were placed into western and eastern genetic groups, with several individuals from western populations assigned to the eastern group and vice versa. These atypical individuals assigned to the new genetic group by BAPS analysis indicate gene flow between western and eastern populations. Similarly, an analysis of molecular variance revealed fewer genetic differences than within studied populations. Both PCA and CANDISC analysis based on eleven morphological traits largely confirmed the existence of two slightly different genetic groups. Two populations containing plants with the most flowers per shoot, one with white-flowered individuals, one with the roundest leaves, and one with the narrowest leaves proved to be the most horticulturally valuable. The genetic and morphological variability found should be a sufficient basis for the potential selection of M. croatica populations and individuals for horticultural purposes. Keywords: morphological characterization, molecular characterization, Micromeria croatica (Lamiaceae), Dinaric Alps Published in DiRROS: 19.03.2024; Views: 399; Downloads: 215 Full text (3,55 MB) This document has many files! More... |
1929. Varijabilnost morfoloških svojstava listova europske crne topole i hibridnih crnih topola u klonskom arhivu u ŽepčuMirzeta Memišević Hodžić, Dalibor Ballian, 2023, original scientific article Abstract: Black poplar (Populus nigra L.) is one of the most important European tree species, inhabiting alluvial habitats along the banks of large rivers. Today, it is one of the most endangered species of forest trees due to habitat devastation, regulation of river flows, excessive exploitation, and the introduction of non-native tree species with which it hybridized. This study aims to determine the variability of morphological properties of black poplar leaves n Bosnia and Herzegovina, within and among populations, and among river basins. Material from the clonal archive of black poplars was researched. The archive was founded in 2005 in Žepče. It contains clones from 161 trees of indigenous black poplars from 26 populations throughout Bosnia and Herzegovina (from the basins of 6 rivers) and 15 hybrid poplar species (table 1 and table 2). Ten leaves were collected from each clone by taking the fifth leaf from the top of the main shoot. Five leaves from each clone were measured. The measurement was performed with a digital movable scale with an accuracy of 0.1 mm and a protractor. The following traits were measured: leaf blade length, leaf blade width, petiole length, total leaf length, the angle between the first lateral nerve and central nerve, and distance from the leaf base to the widest part of the leaf. The number of teeth on one cm above the widest part of the leaf was counted. Data were processed using SPSS 26.0 and EXCEL by populations and river basins. Analysis of variance revealed that there are statistically significant differences among the studied populations (table 4), as well as among river basins (table 7), for all investigated traits. The petiole length trait showed the highest variability, and the lowest variability had the insertion angle of the first lateral and central nerve (table 3). The clones of population of hairy black poplars Čapljina had the lowest values of leaf traits and differed significantly in all measured properties from the others. The most common number of teeth per 1 cm of leaf edge for all populations was four teeth (figure 2), which appeared on 38.3% of leaves. This research gives us a small insight into the morphological characteristics of black poplars in the clone archive Žepče and can be the basis for further researches of the traits of black poplars needed for a successful continuation of work on breeding this species Keywords: european black poplar, clone archive, morphological traits of laeves Published in DiRROS: 19.03.2024; Views: 477; Downloads: 202 Full text (991,66 KB) This document has many files! More... |
1930. Clustering of field maple populations from different ecological conditions in Bosnia and Herzegovina based on discriminant analysis of morphological traitsStjepan Kvesić, Dalibor Ballian, Mirzeta Memišević Hodžić, 2023, original scientific article Abstract: Acer campestre L. is naturally distributed in most of Europe. The species can serve as a valuable model for researching the sensitivity of populations to habitat fragmentation. This research aims to determine whether there is a differentiation of field maple populations based on their division by ecological-vegetation regions, precipitation amounts, temperatures, and altitudes of the populations. The material was collected from 25 populations in Bosnia and Herzegovina, from different ecological-vegetation areas, with twelve trees per population and five fruits and ten leaves per tree. Then, 10 fruit properties and 19 leaf properties were analyzed. A discriminant analysis was performed for population groups based on the ecological-vegetation area, amount of precipitation, average annual air temperature and altitude. The discriminant analysis results showed the distinguishing of groups of populations in the sub-Mediterranean area, and groups of populations with an average annual temperature of 14.00 to 15.99 °C. There was no clear separation of the groups according to the average annual precipitation or altitude. The analysis of the connection established that the influence of environmental factors is more pronounced compared to geographical factors. The key ecological variable that determines morphological separation was temperature and to a lesser extent precipitation. The results of this research will be used in planning of afforestation of suitable, unvegetated land and extreme habitats in the southern and southwestern parts of Bosnia and Herzegovina with Acer campestre. Keywords: Acer campestre, discriminant analysis, ecological-vegetation reionization, population groups differentiation Published in DiRROS: 19.03.2024; Views: 406; Downloads: 247 Full text (1,11 MB) This document has many files! More... |